>> jonathan keenan wrote >> >>> Unfortunately because I want quite an extreme blur to exaggerate the >>> existing shallow DoF it is posterizing in bands which are quite >>> noticeable at 100%. >> >> The method I use in these scenarios is to add a new layer set to overlay >> filled with neutral (50%) grey. Run the noise filter on this layer, and >> you're right, the amount depends on the final output size. Basically, add the >> absolute minimum required to remove the banding. I sometimes add a layer >> mask, fill with black, and paint in the noise where I need it. Sometimes, >> it's worth looking at the individual channels in the image to see if the >> banding is more prevalent in one of them, you can just add noise to that one, >> and that will minimise the overall effect on the image.
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